Glendora, California, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Glendora, California, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 56 of Moderate air quality, showing improvement over 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 10th Oct - 11th Oct 2025
Glendora, California, United States
6 AM10th Oct 2025
6 PM
5 AM11th Oct 2025
76AQI
47AQI
63AQI
56AQI
In the last 24 hours,
Glendora's AQI reached its highest point of 76 at 2 PM during the Day, while the lowest point, 47, was recorded at 7 AM during the Day between 10th Oct and 11th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Glendora, California, United States
15°C12/20°C
17°C13/21°C
17°C13/22°C
18°C14/23°C
21°C16/28°C
25°C19/35°C
27°C24/33°C
22°C18/27°C
18°C16/22°C
22°C16/29°C
24°C16/33°C
25°C18/35°C
27°C20/38°C
26°C20/35°C
22°C17/31°C
20°C18/24°C
20°C17/25°C
21°C17/30°C
21°C16/30°C
21°C17/29°C
21°C15/30°C
21°C15/31°C
19°C15/25°C
19°C14/29°C
20°C13/31°C
19°C14/29°C
19°C13/30°C
18°C13/28°C
21°C14/32°C
25°C17/33°C
--°C/°C
55AQI
46AQI
50AQI
44AQI
2025 Days Vs Air Quality
Glendora, California, United States
69%
195
31%
87
0.3%
1
Total number of days with different AQI categories in last 284 days in 2025 (81 days remaining)
Under WHO’s Safe Air Quality Limits: 69%
Health Risk Level:
Moderate
In 2025, 69% of 284 days were within WHO’s safe air quality limits, and 31% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Glendora, California, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
66AQI
42AQI
54AQI
74AQI
39AQI
34AQI
49AQI
60AQI
59AQI
71AQI
69AQI
30AQI
35AQI
27AQI
27AQI
29AQI
38AQI
50AQI
60AQI
51AQI
30AQI
31AQI
31AQI
30AQI
40AQI
27AQI
26AQI
40AQI
42AQI
54AQI
54AQI
58AQI
72AQI
59AQI
47AQI
23AQI
33AQI
25AQI
31AQI
36AQI
35AQI
29AQI
28AQI
26AQI
29AQI
31AQI
30AQI
40AQI
42AQI
37AQI
41AQI
29AQI
30AQI
36AQI
45AQI
40AQI
38AQI
29AQI
30AQI
37AQI
32AQI
25AQI
31AQI
41AQI
27AQI
24AQI
29AQI
32AQI
29AQI
28AQI
25AQI
21AQI
19AQI
30AQI
37AQI
43AQI
21AQI
20AQI
23AQI
29AQI
35AQI
49AQI
43AQI
47AQI
46AQI
26AQI
26AQI
31AQI
33AQI
20AQI
22AQI
24AQI
26AQI
27AQI
20AQI
22AQI
26AQI
35AQI
47AQI
50AQI
50AQI
54AQI
58AQI
55AQI
49AQI
37AQI
24AQI
32AQI
35AQI
37AQI
38AQI
55AQI
50AQI
48AQI
40AQI
16AQI
20AQI
23AQI
40AQI
52AQI
52AQI
47AQI
47AQI
27AQI
26AQI
30AQI
35AQI
42AQI
46AQI
37AQI
37AQI
47AQI
24AQI
34AQI
47AQI
53AQI
40AQI
36AQI
42AQI
52AQI
54AQI
56AQI
58AQI
51AQI
49AQI
51AQI
49AQI
49AQI
45AQI
48AQI
51AQI
49AQI
37AQI
42AQI
47AQI
45AQI
42AQI
50AQI
50AQI
50AQI
57AQI
57AQI
55AQI
53AQI
57AQI
57AQI
60AQI
60AQI
58AQI
57AQI
57AQI
50AQI
50AQI
52AQI
53AQI
49AQI
51AQI
55AQI
52AQI
50AQI
42AQI
44AQI
45AQI
48AQI
50AQI
105AQI
66AQI
57AQI
53AQI
49AQI
47AQI
54AQI
55AQI
54AQI
51AQI
44AQI
34AQI
28AQI
33AQI
36AQI
43AQI
42AQI
32AQI
28AQI
31AQI
26AQI
26AQI
33AQI
35AQI
37AQI
44AQI
54AQI
54AQI
57AQI
57AQI
62AQI
67AQI
69AQI
63AQI
60AQI
55AQI
56AQI
56AQI
55AQI
60AQI
63AQI
55AQI
45AQI
47AQI
52AQI
50AQI
45AQI
53AQI
57AQI
55AQI
58AQI
54AQI
54AQI
48AQI
48AQI
38AQI
46AQI
48AQI
47AQI
46AQI
50AQI
44AQI
49AQI
50AQI
44AQI
30AQI
31AQI
47AQI
53AQI
50AQI
61AQI
63AQI
62AQI
61AQI
41AQI
39AQI
48AQI
41AQI
45AQI
49AQI
51AQI
51AQI
46AQI
35AQI
37AQI
34AQI
42AQI
47AQI
53AQI
38AQI
47AQI
43AQI
50AQI
64AQI
61AQI
63AQI
52AQI
56AQI
44AQI
37AQI
31AQI
37AQI
44AQI
51AQI
45AQI
54AQI
46AQI
53AQI
No. of days
202544AQI
Highest AQI recorded in
August54AQI
Lowest AQI recorded in
March31AQI
202444AQI
Highest AQI recorded in
September56AQI
Lowest AQI recorded in
March32AQI
202341AQI
Highest AQI recorded in
July65AQI
Lowest AQI recorded in
January26AQI
202241AQI
Highest AQI recorded in
August54AQI
Lowest AQI recorded in
December25AQI
202150AQI
Highest AQI recorded in
September61AQI
Lowest AQI recorded in
January35AQI
202055AQI
Highest AQI recorded in
September90AQI
Lowest AQI recorded in
March31AQI
Most & Least Polluted Years Over the Last 6 Years
Glendora's annual 2025 AQI (44) shows an average percentage change of -4.2% (improved AQI) compared to previous years: 2020 (55), 2021 (50), 2022 (41), 2023 (41), 2024 (44).